[问答题]
The image shows a food web in a salt mglytjp *)puhze m3m04f;8 .s rarsh ec/bc4c bp p*8dx1d 0iecosystem.
1.Identify all the detritivores in the food web shown above.
2.Define secondary productivity.
3.Explain why energy is lost during the transfer from producers to herbivores.
4.Describe a method a farmer could use to estimate the gross primary productivity per month of his wheat crop.
